A Grades A1 to A35 A Grades A CBN Ceramic C Carbonitride alloy C C C C Coated carbide C Cermet Carbide Selection of Sumitomo Grades (Turning) ……… A2 Selection of Sumitomo Grades (Milling) ………… A3 Grade Comparison Chart (Coated) …………………… A4 (Cermet, Carbide, Ceramic) … A5 (CBN, Polycrystalline Diamond) … A6 Chipbreaker Comparison Chart …………………… A7 Application-Specific Chipbreaker & Grade Selection Guide Steel Turning Inserts ……………………………… A8 Stainless Steel Turning Inserts ……………… A12 Cast Iron Turning Inserts ……………………… A14 Exotic Alloy Turning Inserts…………………… A16 Hardened Steel Turning Inserts ……………… A18 Non-Ferrous Metal Turning Inserts ………… A20 Inserts for Small Product Machining ……… A22 Coated Carbide …………………………………… A24 Cermet ……………………………………………… A27 Carbide ……………………………………………… A28 CBN ………………………………………………… A30 Polycrystalline Diamond ………………………… A32 Ceramic ……………………………………………… A34 Material Properties………………………………… A35 A1